Lots of customers ask “Is there an easy way to tell which sump plug is fitted to my car?”

Fortunately, there is.  Rather than looking at loads of tables with engine numbers etc, and then still getting the wrong one, because the table wasn’t 100% right, just follow these simple steps:

Have a look underneath the car at the sump, locate the sump plug and see what it looks like.


Does it have a 27mm diameter, with a 10mm Allen Key hole inside, then it is an SP9. 

alfa-romeo-fiat-lancia-sp9.jpg sp9w-sump-plug-washer.jpg

 SP9 Sump Plug

27mm diameter & 10mm Allen Key hole.

 SP9W - Sump Plug & Washer


If it has a 25mm round exterior with an 8mm Allen key hole inside, then it is an SP13.

alfa-romeo-fiat-lancia-sp13.jpg alfa-romeo-fiat-sump-plug-with-washer.jpg

SP13 Sump Plug

25mm exterior & 8mm Allen Key hole

 SP13W - Sump Plug & Washer


If your sump plug just has a 17mm flat hex head, then it is an SP50.

alfa-romeo-fiat-lancia-sp50.jpg sump-plug-for-alfa-romeo-mito-fiat-500-petrol-engines.jpg

SP50 Sump Plug

17mm Hex Head

 SP50W - Sump Plug & Washer


Does your sump plug have a 26mm conical head with a raised 15mm hex head, then it is an SP15.

alfa-romeo-fiat-lancia-sp15.jpg sp15w-sump-plug-for-fiat-alfa-romeo-lancia.jpg

SP15 Sump Plug

26mm conical head with 
raised 15mm hex head
 SP15W - Sump Plug & Washer


Does it have a 25mm round head with a 45mm torx recess inside, then it is an SP6.

alfa-romeo-fiat-lancia-sp6.jpg sp6w-sump-plug.jpg

 SP6 Sump Pug

25mm round head with 45mm torx recess.

 SP6W - Sump Plug & Washer


Finally, once you know which Sump Plug is the right one for your vehicle, don't forget to order it from our online store.

You may also find our video guide helpful: